Question about 2006 Datsun Pulsar

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Fuel leaking from top of fuel tank when engine running

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You sure its the top of the tank? It may be the filler hose flange. They are rubber and rot away over time, especially with today's ethenol blends.

Posted on Feb 04, 2015

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Your fuel return line is leaking or broken.

Posted on Feb 04, 2015

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Posted on Jan 02, 2017

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It bogg down on full throttle and gas leak on top of the tank while running


if you have a fuel leak from top of tank then it could be a fuel line or O ring leaking, which can cause a drop in fuel pressure causing it to bog down. if its a steel fuel tank the tank could be rotted out. either way fix fuel leak first and go from there.

Aug 12, 2015 | Cars & Trucks

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Failed smog test ; gross air leak at vapor recovery system. Replaced gas cap from parts house with a dealer supplied gas cap and the gross leak is gone but a minor air leak is...


If you just want to get through the smog test,they usually allow one monitor test to be incomplete and still pass.
If your area does,clear the codes and fill the fuel tank to the top.The other monitors should run and complete but the fuel tank monitor will not run with a full tank of gas so will not turn on the check engine light related to a tank vac leak.KEEP THE TANK FULL,and go get your smog test!

May 05, 2017 | Cars & Trucks

3 Answers

I HAVE CODE 0440 MY SERVICE SOON LIGHT ON I FIX FUEL CUP BUT STILL ON LIGHT WHAT TO DO


P0440 - Evaporative Emission Control System Malfunction
Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking Tech notes Loose fuel tank filler cap is the most common cause that triggers the P0440 code.

Sep 17, 2012 | 2002 Pontiac Grand Prix

1 Answer

My 1993 mercury tracer has a fuel leak


first locate approx area of leak, wet spot, smell. fuel lines run from top of tank in rear of vehicle to the front usually alomg the inside frame rail on drivers side and up into engine compartment (under the hood) to the back of the motor. it runs into fuel rail assy where the injectors are passing through a fuel regulator first. fuel line will have a valve similar to that on a bicycle or car tire and should have a tag on it, sometimes its on the fuel rail. trace the fuel line tu the fuel tank or from the tank to engine compartment while its running, in park with emergency/parking brake on to accurately locate leak but be careful for fuel that may be spraying. i recomend safety glasses and a flashlight. most common leaks are due to worn/bad seals in the "quick connect" connections or a crack it the line itself.

May 28, 2012 | 1993 Mercury Tracer

2 Answers

Fuel leaking at tank when motor is running, stops when engine is off 1992 Honda Accord


The fuel pump for this car is electric and is located inside the fuel tank, so you have a leaking fuel line, when the pump is running you have a leak, when the engine is shut off the pressure goes away and no leak.

Mar 29, 2011 | 1992 Honda Accord

1 Answer

When vehicle is running, fuel leaks from tank, if I shut the vehicle off and open the gas cap and release the pressure the leak stops. Could a defective seal at the top of the tank cause this problem.


the pressure in the tanks is not enough to "lift" the fuel up to where the seal is on the top. the tanks usually have the fuel pump and level sensor mounted in thru the top. actually if there was a leak anywhere above the fuel level in the tank it would not leak fuel but leak pressure which you would not see. it most likely is a rust thru spot on the tank, it only needs to be a small pin hole for it to leak and it can be very hard to see.

Jan 16, 2011 | Ford Taurus Cars & Trucks

1 Answer

My 1996 honda accord consumes too much fuel in a ratio of 1-6 km /liter, what seems to be the problem? I have it tuned up, cleaned the throttles, etc,, but to no avail. whats the best thing to do?


Since you've cleverly already done the normal tune-up items that preserve the 96 Accord's good fuel economy, its time to move onto the tougher adventures.

Cars with outrageously bad fuel consumption are losing fuel somehow (aka leaking).
(a) There's a fuel tank drain plug on the bottom of the fuel tank (used to drain tank for service) - make sure its tight and that the tank isn't leaking fuel there.
(b) check your fuel lines - there are 2 (one supplies fuel to the engine, and the other returns excess to the tank). If either is leaking, your car will lose petrol quickly.
(c) the evaporative fuel canister - instead of absorbing vapours, it may be full of fuel and leaking..
(d) check your fuel rail - its pressurized with fuel while the car is running - it may be leaking - and if it is: (1) the top of your engine will soon catch fire (2) the fuel may be evaporating as soon as it leaks, since the top of the engine gets so hot.

Use a fuel pressure gauge to test the fuel pressure in your 96 Accord's fuel rail - attach your
(with an appropriate (brass) adapter) to where the banjo bolt enters the top of the fuel filter - as
described in this passage from the Honda repair manual:

From the 1996 Honda Accord repair manual:
Note that this part of the Honda manual fails to mention that before you disconnect the negative terminal of the battery, you must note (and write down) the 3-digit radio lock code
--- begin excerpt ---
The Fuel System Pressure Specification


38-46 PSI (Pounds per Square Inch)Remove the ground cable from the negative battery post and also remove the fuel tank filler cap. Slowly release system pressure at the fuel filter and cleanup spilled fuel. Remove the Banjo bolt and install a fuel pressure test gauge. Reconnect the battery ground cable and proceed to start the engine and allow the system pressure to stabilize. While the engine is at idle, block off/pinch the number (1) vacuum line to the fuel pressure regulator and visually verify the fuel pressure reading on the test gauge.
--- end excerpt from 1996 Honda Accord repair guide ---

(e) possible leaking fuel pressure regulator - located at back of top side of engine, and looks like an
enlarged fuel filter - with hose clamps on either end clamping the fuel line. Retighten its bolts to 12 Nm (9 ft-lbs) when done checking it (for leakage).

(f) to move on from fuel - if you're getting only partial ignition, your fuel economy will suffer too - but you'll smell alot of unburned fuel in your exhaust (and get alot of backfiring). Use your HEI (high energy ignition) tester to rule out ignition (spark) problems.

Jan 02, 2011 | 1996 Honda Accord

1 Answer

How to locate the gas filter on a voyager 4cl lx 2003


FUEL FILTER LOCATED ON TOP OF FUEL TANK.YOU HAVE TO LOWER TANK JUST ENOUGH TO REMOVE FUEL FILTER.FIRST RELIEF FUEL PRESSURE BEFORE REMOVING FUEL FILTER.TO RELIEF FUEL PRESSURE REMOVE FUEL FILLER CAP.REMOVE FUEL PUMP RELAY FROM THE FUSE AND RELAY BOX LOCATED LEFT SIDE OF THE ENGINE COMPARTMENT. START ENGINE LET IT RUN UNTIL IT RUN OUT OF FUEL.CRANK ENGINE OVER FEW MORE TIMES TO MAKE SURE ALL FUEL OUT OF FUEL LINE.NOW FUEL PRESSURE IS RELIEF.WHEN YOU ARE DONE CHECK FOR FUEL LEAKS BEFORE DRIVING VECHICLE.

Dec 26, 2010 | 2003 Chrysler Voyager

1 Answer

Gas line leak. looking for a diagram of how gas lines are run


The Lines are simple if it's a 2.4 EFI the lines run on the driver side inner rail from the center top of fuel tank, and up the middle of the firewall to the injector rail or throttle body carburetor there is also one line that runs from the evap canister back to the tank and to the fuel system three lines total one is a return line the large line is the main fuel line and has the fuel filter mounted on it and is under the driver side door inside the frame rail.

Jun 24, 2009 | 1995 Nissan Pickup

1 Answer

Gas leaking out where you fill the front tank


You probably have a defective fuel-tank selector valve. Its located on the left frame rail, halfway down. While the vehicle is running, tank"A" is pumping fuel to the engine, while tank "B" is getting the unneeded fuel that is returning from the engine. Thats why it is overflowing.

Jun 18, 2009 | 1990 Ford F150

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